Add .npmignore

.npmignore

@@ -0,0 +1,45 @@
+# src
+/src
+/demo
+
+# webpack
+webpack.config*
+babel.config*
+
+# linters
+.eslint*
+.huskyrc*
+.lintstagedrc*
+prettier*
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# misc
+.DS_Store
+*.pem
+.vscode
+.idea
+.env
+.envrc
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.env.*
+.idea/
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+tags
+tags*
+
+# env
+.env*